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   <div id="projectname">nRF Gazell
   &#160;<span id="projectnumber">version 0.4.2</span>
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<div class="title">Board/nrf6310/gzll/gzll_ack_payload/main_device_ack_payload.c</div>  </div>
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<a href="main__device__ack__payload_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* Copyright (c) 2012 Nordic Semiconductor. All Rights Reserved.</span>
<a name="l00002"></a>00002 <span class="comment">*</span>
<a name="l00003"></a>00003 <span class="comment">* The information contained herein is property of Nordic Semiconductor ASA.</span>
<a name="l00004"></a>00004 <span class="comment">* Terms and conditions of usage are described in detail in NORDIC</span>
<a name="l00005"></a>00005 <span class="comment">* SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.</span>
<a name="l00006"></a>00006 <span class="comment">*</span>
<a name="l00007"></a>00007 <span class="comment">* Licensees are granted free, non-transferable use of the information. NO</span>
<a name="l00008"></a>00008 <span class="comment">* WARRANTY of ANY KIND is provided. This heading must NOT be removed from</span>
<a name="l00009"></a>00009 <span class="comment">* the file.</span>
<a name="l00010"></a>00010 <span class="comment">*</span>
<a name="l00011"></a>00011 <span class="comment">* $LastChangedRevision: 15198 $</span>
<a name="l00012"></a>00012 <span class="comment">*/</span>
<a name="l00013"></a>00013 
<a name="l00034"></a>00034 <span class="preprocessor">#include &quot;<a class="code" href="nrf__gzll_8h.html" title="Gazell Link Layer API.">nrf_gzll.h</a>&quot;</span>
<a name="l00035"></a>00035 <span class="preprocessor">#include &quot;nrf_gpio.h&quot;</span>
<a name="l00036"></a>00036 <span class="preprocessor">#include &quot;nrf_delay.h&quot;</span>
<a name="l00037"></a>00037 
<a name="l00038"></a>00038 <span class="comment">/*****************************************************************************/</span>
<a name="l00040"></a>00040 <span class="comment">/*****************************************************************************/</span>
<a name="l00041"></a>00041 
<a name="l00042"></a>00042 <span class="comment">// Define pipe</span>
<a name="l00043"></a><a class="code" href="group__gzll__device__ack__payload__example.html#gae28843c923b3481f8a94798e7ccba523">00043</a> <span class="preprocessor">#define PIPE_NUMBER 0 ///&lt; We use pipe 0 in this example</span>
<a name="l00044"></a>00044 <span class="preprocessor"></span>
<a name="l00045"></a>00045 <span class="comment">// GPIO</span>
<a name="l00046"></a><a class="code" href="group__gzll__device__ack__payload__example.html#ga2a2f690f8bdeeb4003203ff5e3edaffc">00046</a> <span class="preprocessor">#define BUTTONS NRF_GPIO_PORT_SELECT_PORT0 ///&lt; GPIO port for reading from buttons</span>
<a name="l00047"></a><a class="code" href="group__gzll__device__ack__payload__example.html#ga61686d33603491344883775b9b31e172">00047</a> <span class="preprocessor"></span><span class="preprocessor">#define LEDS    NRF_GPIO_PORT_SELECT_PORT1 ///&lt; GPIO port for writing to LEDs</span>
<a name="l00048"></a>00048 <span class="preprocessor"></span>
<a name="l00049"></a>00049 <span class="comment">// Define payload length</span>
<a name="l00050"></a><a class="code" href="group__gzll__device__ack__payload__example.html#gaed1097d348540e6d609ced933dfaa26b">00050</a> <span class="preprocessor">#define TX_PAYLOAD_LENGTH 1 ///&lt; We use 1 byte payload length when transmitting</span>
<a name="l00051"></a>00051 <span class="preprocessor"></span>
<a name="l00052"></a>00052 <span class="comment">// Data and acknowledgement payloads</span>
<a name="l00053"></a><a class="code" href="group__gzll__device__ack__payload__example.html#ga1b254eba12826664994a6c1be0279b30">00053</a> <span class="keyword">static</span> uint8_t <a class="code" href="group__gzll__device__ack__payload__example.html#ga1b254eba12826664994a6c1be0279b30" title="Payload to send to Host.">data_payload</a>[<a class="code" href="group__gzll__device__ack__payload__example.html#gaed1097d348540e6d609ced933dfaa26b" title="We use 1 byte payload length when transmitting.">TX_PAYLOAD_LENGTH</a>];                
<a name="l00054"></a><a class="code" href="group__gzll__device__ack__payload__example.html#gabeaede42f5ae274be752a8cee2295d47">00054</a> <span class="keyword">static</span> uint8_t <a class="code" href="group__gzll__device__ack__payload__example.html#gabeaede42f5ae274be752a8cee2295d47" title="Placeholder for received ACK payloads from Host.">ack_payload</a>[<a class="code" href="group__gzll__02__api.html#ga8b684b647780717d25ff16f1a42e166f" title="Maximum allowed payload length in bytes.">NRF_GZLL_CONST_MAX_PAYLOAD_LENGTH</a>]; 
<a name="l00055"></a>00055 
<a name="l00056"></a>00056 <span class="comment">// Debug helper variables</span>
<a name="l00057"></a>00057 <span class="keyword">static</span> <span class="keyword">volatile</span> <span class="keywordtype">bool</span> init_ok, enable_ok, push_ok, pop_ok, tx_success;  
<a name="l00058"></a>00058 
<a name="l00062"></a>00062 <span class="comment">/*****************************************************************************/</span>
<a name="l00068"></a>00068 <span class="comment">/*****************************************************************************/</span>
<a name="l00069"></a>00069 <span class="comment">//lint -save -e514 Unusual use of a boolean expression (use of &amp;= assignment).</span>
<a name="l00070"></a>00070 
<a name="l00071"></a><a class="code" href="group__gzll__device__ack__payload__example.html#gae66f6b31b5ad750f1fe042a706a4e3d4">00071</a> <span class="keywordtype">int</span> <a class="code" href="group__gzll__device__ack__payload__example.html#gae66f6b31b5ad750f1fe042a706a4e3d4" title="Main function.">main</a>()
<a name="l00072"></a>00072 {
<a name="l00073"></a>00073     uint8_t debug_led_output;
<a name="l00074"></a>00074 
<a name="l00075"></a>00075     <span class="comment">// Setup port directions</span>
<a name="l00076"></a>00076     <a class="code" href="group__nrf__gpio.html#gaaa72c88a2a29927a1eeff691d6a21afc" title="Set the direction of a port.">nrf_gpio_port_dir_set</a>(<a class="code" href="group__gzll__device__ack__payload__example.html#ga2a2f690f8bdeeb4003203ff5e3edaffc" title="GPIO port for reading from buttons.">BUTTONS</a>, <a class="code" href="group__nrf__gpio.html#gga494d7ac30db1cbb6366e0b9ebd5b49b4a6ec5811669635e30b9dc014e1f494936" title="Input.">NRF_GPIO_PORT_DIR_INPUT</a>);
<a name="l00077"></a>00077     <a class="code" href="group__nrf__gpio.html#gaaa72c88a2a29927a1eeff691d6a21afc" title="Set the direction of a port.">nrf_gpio_port_dir_set</a>(<a class="code" href="group__gzll__device__ack__payload__example.html#ga61686d33603491344883775b9b31e172" title="GPIO port for writing to LEDs.">LEDS</a>, <a class="code" href="group__nrf__gpio.html#gga494d7ac30db1cbb6366e0b9ebd5b49b4a90b7ce7a76775cb7534487635755be3f" title="Output.">NRF_GPIO_PORT_DIR_OUTPUT</a>);
<a name="l00078"></a>00078 
<a name="l00079"></a>00079     <span class="comment">// Initialize Gazell</span>
<a name="l00080"></a>00080     init_ok = <a class="code" href="group__gzll__02__api.html#gacba07d9c893b4673c563ced97cccba94" title="Initialize Gazell.">nrf_gzll_init</a>(<a class="code" href="group__gzll__02__api.html#gga2321f5573e2cd70651559e6380433edaaf43e2f82283221e9ecacaca178934e47" title="Device mode.">NRF_GZLL_MODE_DEVICE</a>);
<a name="l00081"></a>00081     
<a name="l00082"></a>00082     <span class="comment">// Attempt sending every packet up to 100 times    </span>
<a name="l00083"></a>00083     init_ok &amp;= <a class="code" href="group__gzll__02__api.html#ga6e1c4ec6c4f7acf92a97bffbb6b89333" title="Set the maximum number of TX attempts that can be used for a single packet.">nrf_gzll_set_max_tx_attempts</a>(100);
<a name="l00084"></a>00084 
<a name="l00085"></a>00085     <span class="comment">// Load data into TX queue</span>
<a name="l00086"></a>00086     <a class="code" href="group__gzll__device__ack__payload__example.html#ga1b254eba12826664994a6c1be0279b30" title="Payload to send to Host.">data_payload</a>[0] = <a class="code" href="group__nrf__gpio.html#ga40bee84dc81b9f8981eb2647dac9d267" title="Read GPIO port.">nrf_gpio_port_read</a>(<a class="code" href="group__gzll__device__ack__payload__example.html#ga2a2f690f8bdeeb4003203ff5e3edaffc" title="GPIO port for reading from buttons.">BUTTONS</a>);  
<a name="l00087"></a>00087     push_ok = <a class="code" href="group__gzll__02__api.html#ga1c0b1d1838e032af28c35d7c3e0603e0" title="Add a packet to the tail of the TX FIFO.">nrf_gzll_add_packet_to_tx_fifo</a>(<a class="code" href="group__gzll__device__ack__payload__example.html#gae28843c923b3481f8a94798e7ccba523" title="We use pipe 0 in this example.">PIPE_NUMBER</a>, <a class="code" href="group__gzll__device__ack__payload__example.html#ga1b254eba12826664994a6c1be0279b30" title="Payload to send to Host.">data_payload</a>, <a class="code" href="group__gzll__device__ack__payload__example.html#gaed1097d348540e6d609ced933dfaa26b" title="We use 1 byte payload length when transmitting.">TX_PAYLOAD_LENGTH</a>);
<a name="l00088"></a>00088     
<a name="l00089"></a>00089     <span class="comment">// Enable Gazell to start sending over the air</span>
<a name="l00090"></a>00090     enable_ok = <a class="code" href="group__gzll__02__api.html#gadfb1003b245b019481334e6d087f928e" title="Enable Gazell.">nrf_gzll_enable</a>();         
<a name="l00091"></a>00091 
<a name="l00092"></a>00092     <span class="keywordflow">while</span>(1)
<a name="l00093"></a>00093     {
<a name="l00094"></a>00094         <span class="comment">// Error handling</span>
<a name="l00095"></a>00095         debug_led_output = ((uint8_t)tx_success &lt;&lt; 4) | ((uint8_t)pop_ok &lt;&lt; 3) | ((uint8_t)push_ok &lt;&lt; 2) | ((uint8_t)enable_ok &lt;&lt; 1) | (uint8_t)init_ok;                
<a name="l00096"></a>00096         
<a name="l00097"></a>00097         <span class="comment">// If an error has occured</span>
<a name="l00098"></a>00098         <span class="keywordflow">if</span>(debug_led_output != 0x1F)
<a name="l00099"></a>00099         {
<a name="l00100"></a>00100             <a class="code" href="group__nrf__gpio.html#gac1d4940bc5ad4aad4f6363c7021b08ae" title="Write GPIO port.">nrf_gpio_port_write</a>(<a class="code" href="group__gzll__device__ack__payload__example.html#ga61686d33603491344883775b9b31e172" title="GPIO port for writing to LEDs.">LEDS</a>,0xFF);      
<a name="l00101"></a>00101             nrf_delay_us(1000000); <span class="comment">// 1 second delay </span>
<a name="l00102"></a>00102             <a class="code" href="group__nrf__gpio.html#gac1d4940bc5ad4aad4f6363c7021b08ae" title="Write GPIO port.">nrf_gpio_port_write</a>(<a class="code" href="group__gzll__device__ack__payload__example.html#ga61686d33603491344883775b9b31e172" title="GPIO port for writing to LEDs.">LEDS</a>, debug_led_output);
<a name="l00103"></a>00103             nrf_delay_us(1000000); <span class="comment">// 1 second delay </span>
<a name="l00104"></a>00104             <a class="code" href="group__nrf__gpio.html#gac1d4940bc5ad4aad4f6363c7021b08ae" title="Write GPIO port.">nrf_gpio_port_write</a>(<a class="code" href="group__gzll__device__ack__payload__example.html#ga61686d33603491344883775b9b31e172" title="GPIO port for writing to LEDs.">LEDS</a>,0xF0 + (uint32_t)<a class="code" href="group__gzll__02__api.html#gab36bed58f70b88b8fede5d3d8fa3f1c7" title="Gets the Gazell error code.">nrf_gzll_get_error_code</a>()); 
<a name="l00105"></a>00105             nrf_delay_us(1000000); <span class="comment">// 1 second delay </span>
<a name="l00106"></a>00106         }
<a name="l00107"></a>00107 
<a name="l00108"></a>00108         <span class="comment">// Optionally send the CPU to sleep while waiting for a callback.</span>
<a name="l00109"></a>00109         <span class="comment">// __WFI();</span>
<a name="l00110"></a>00110     }
<a name="l00111"></a>00111 }
<a name="l00112"></a>00112 
<a name="l00113"></a>00113 
<a name="l00114"></a>00114 <span class="comment">/*****************************************************************************/</span>
<a name="l00116"></a>00116 <span class="comment">/*****************************************************************************/</span>
<a name="l00117"></a>00117 
<a name="l00118"></a>00118 
<a name="l00119"></a>00119 <span class="comment">// If an ACK was received, we send another packet. </span>
<a name="l00120"></a><a class="code" href="group__gzll__device__ack__payload__example.html#gac1306762dc2ccfc5c2bbdbe2d85a93aa">00120</a> <span class="keywordtype">void</span>  <a class="code" href="group__gzll__02__api.html#gac1306762dc2ccfc5c2bbdbe2d85a93aa" title="ACK received callback (Device mode only).">nrf_gzll_device_tx_success</a>(uint32_t pipe, <a class="code" href="structnrf__gzll__device__tx__info__t.html" title="Data structure containing information about the last packet transmission.">nrf_gzll_device_tx_info_t</a> tx_info)
<a name="l00121"></a>00121 {
<a name="l00122"></a>00122     uint32_t ack_payload_length = <a class="code" href="group__gzll__02__api.html#ga8b684b647780717d25ff16f1a42e166f" title="Maximum allowed payload length in bytes.">NRF_GZLL_CONST_MAX_PAYLOAD_LENGTH</a>;    
<a name="l00123"></a>00123     tx_success = <span class="keyword">true</span>;
<a name="l00124"></a>00124 
<a name="l00125"></a>00125     <span class="keywordflow">if</span> (tx_info.<a class="code" href="structnrf__gzll__device__tx__info__t.html#a82d823d6abc51dc89fd4735decec9149" title="A payload was received in the ACK.">payload_received_in_ack</a>)
<a name="l00126"></a>00126     {
<a name="l00127"></a>00127         <span class="comment">// Pop packet and write first byte of the payload to the GPIO port.</span>
<a name="l00128"></a>00128         pop_ok = <a class="code" href="group__gzll__02__api.html#ga419c8ce6a3e08d5dec8b50ef88b3cc2b" title="Fetch a packet from the head of the RX FIFO.">nrf_gzll_fetch_packet_from_rx_fifo</a>(pipe, <a class="code" href="group__gzll__device__ack__payload__example.html#gabeaede42f5ae274be752a8cee2295d47" title="Placeholder for received ACK payloads from Host.">ack_payload</a>, &amp;ack_payload_length);
<a name="l00129"></a>00129         <span class="keywordflow">if</span> (ack_payload_length &gt; 0)
<a name="l00130"></a>00130         {
<a name="l00131"></a>00131             <a class="code" href="group__nrf__gpio.html#gac1d4940bc5ad4aad4f6363c7021b08ae" title="Write GPIO port.">nrf_gpio_port_write</a>(<a class="code" href="group__gzll__device__ack__payload__example.html#ga61686d33603491344883775b9b31e172" title="GPIO port for writing to LEDs.">LEDS</a>, ~<a class="code" href="group__gzll__device__ack__payload__example.html#gabeaede42f5ae274be752a8cee2295d47" title="Placeholder for received ACK payloads from Host.">ack_payload</a>[0]);  <span class="comment">// Button press is active low. </span>
<a name="l00132"></a>00132         }
<a name="l00133"></a>00133     }
<a name="l00134"></a>00134     
<a name="l00135"></a>00135     <span class="comment">// Read buttons and load data payload into TX queue</span>
<a name="l00136"></a>00136     <a class="code" href="group__gzll__device__ack__payload__example.html#ga1b254eba12826664994a6c1be0279b30" title="Payload to send to Host.">data_payload</a>[0] = <a class="code" href="group__nrf__gpio.html#ga40bee84dc81b9f8981eb2647dac9d267" title="Read GPIO port.">nrf_gpio_port_read</a>(<a class="code" href="group__gzll__device__ack__payload__example.html#ga2a2f690f8bdeeb4003203ff5e3edaffc" title="GPIO port for reading from buttons.">BUTTONS</a>);
<a name="l00137"></a>00137     push_ok = <a class="code" href="group__gzll__02__api.html#ga1c0b1d1838e032af28c35d7c3e0603e0" title="Add a packet to the tail of the TX FIFO.">nrf_gzll_add_packet_to_tx_fifo</a>(pipe, <a class="code" href="group__gzll__device__ack__payload__example.html#ga1b254eba12826664994a6c1be0279b30" title="Payload to send to Host.">data_payload</a>, <a class="code" href="group__gzll__device__ack__payload__example.html#gaed1097d348540e6d609ced933dfaa26b" title="We use 1 byte payload length when transmitting.">TX_PAYLOAD_LENGTH</a>);
<a name="l00138"></a>00138 }
<a name="l00139"></a>00139 
<a name="l00140"></a>00140 
<a name="l00141"></a>00141 <span class="comment">/* If the transmission failed, send a new packet.</span>
<a name="l00142"></a>00142 <span class="comment"> * This callback does not occur by default since NRF_GZLL_DEFAULT_MAX_TX_ATTEMPTS </span>
<a name="l00143"></a>00143 <span class="comment"> * is 0 (inifinite retransmits)</span>
<a name="l00144"></a>00144 <span class="comment"> */</span>
<a name="l00145"></a><a class="code" href="group__gzll__device__ack__payload__example.html#ga0642fed399ed3ec41406cd4323edf5ad">00145</a> <span class="keywordtype">void</span> <a class="code" href="group__gzll__02__api.html#ga0642fed399ed3ec41406cd4323edf5ad" title="Transmission failed callback (Device mode only).">nrf_gzll_device_tx_failed</a>(uint32_t pipe, <a class="code" href="structnrf__gzll__device__tx__info__t.html" title="Data structure containing information about the last packet transmission.">nrf_gzll_device_tx_info_t</a> tx_info)
<a name="l00146"></a>00146 {
<a name="l00147"></a>00147     tx_success = <span class="keyword">false</span>;
<a name="l00148"></a>00148 
<a name="l00149"></a>00149     <span class="comment">// Load data into TX queue</span>
<a name="l00150"></a>00150     <a class="code" href="group__gzll__device__ack__payload__example.html#ga1b254eba12826664994a6c1be0279b30" title="Payload to send to Host.">data_payload</a>[0] = <a class="code" href="group__nrf__gpio.html#ga40bee84dc81b9f8981eb2647dac9d267" title="Read GPIO port.">nrf_gpio_port_read</a>(<a class="code" href="group__gzll__device__ack__payload__example.html#ga2a2f690f8bdeeb4003203ff5e3edaffc" title="GPIO port for reading from buttons.">BUTTONS</a>);
<a name="l00151"></a>00151     push_ok = <a class="code" href="group__gzll__02__api.html#ga1c0b1d1838e032af28c35d7c3e0603e0" title="Add a packet to the tail of the TX FIFO.">nrf_gzll_add_packet_to_tx_fifo</a>(pipe, <a class="code" href="group__gzll__device__ack__payload__example.html#ga1b254eba12826664994a6c1be0279b30" title="Payload to send to Host.">data_payload</a>, <a class="code" href="group__gzll__device__ack__payload__example.html#gaed1097d348540e6d609ced933dfaa26b" title="We use 1 byte payload length when transmitting.">TX_PAYLOAD_LENGTH</a>);
<a name="l00152"></a>00152 }
<a name="l00153"></a>00153 
<a name="l00154"></a>00154 
<a name="l00155"></a>00155 
<a name="l00156"></a>00156 <span class="comment">// Callbacks not needed in this example.</span>
<a name="l00157"></a><a class="code" href="group__gzll__device__ack__payload__example.html#ga116b8ce684c3f6fe8c63c371b913aa3e">00157</a> <span class="keywordtype">void</span> <a class="code" href="group__gzll__02__api.html#ga116b8ce684c3f6fe8c63c371b913aa3e" title="Data packet received callback (Host mode only).">nrf_gzll_host_rx_data_ready</a>(uint32_t pipe, <a class="code" href="structnrf__gzll__host__rx__info__t.html" title="Data structure containing information about the last packet received.">nrf_gzll_host_rx_info_t</a> rx_info)
<a name="l00158"></a>00158 {}
<a name="l00159"></a><a class="code" href="group__gzll__device__ack__payload__example.html#ga70d3a691deff3748a4a8a17a2feceec2">00159</a> <span class="keywordtype">void</span> <a class="code" href="group__gzll__02__api.html#ga722e2ee917072fca60a50a23d8c84414" title="Disabled callback.">nrf_gzll_disabled</a>()
<a name="l00160"></a>00160 {}
<a name="l00161"></a>00161 
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